P:MARGINULA. 257 



secondary riblets between the principal ribs. Independent of the 

 coarse sculpture a marking of very fine longitudinal and transverse 

 ridges becomes visible under a lens. The anterior rib terminates in 

 a long slit, about one-third the length of the shell. Slit-fasciole nar- 

 row, crossed by a series of very regular little imbricating lamellae. 

 Edge denticulated. Length 8, width 6 mill. 



Island of Art, New Caledonian Archipelago. 



E. bicancellata MONTR., Journ. de Conchyl. 1860, p. 112, t. 2, f.9. 

 Somewhat allied to E. fenestrella Dh. The above is taken from 

 Montrouzier's excellent description. 



E. MICANS A. Adams. PI. 64, fig. 15. 



'Elongate-oval, pale brown, shining, vertex declining backward ; 

 regularly cancellated with radiating riblets and elevated transverse 

 lines; pits square; margin of aperture denticulated, incision long 

 and large. Scarcely differing from E. elongata, which also has the 

 interstices deep and shining, except in being a much more conical 

 shell. (Ad.) 



Raines' Island, N. Australia. 



E. micans AD., P. Z. S. 1851, p. 84, no. 18. SOWB., Thes. p. 212, 

 f. 60. 



E. CONCINNA A. Adams. PI. 28, figs. 5, 6. 



Ovate-depressed, whitish, vertex posterior, declining toward the 

 margin ; having about 12 distinct, radiating sulcose ribs, interstices 

 finely decussated with longitudinal and transverse lines ; margin of 

 the aperture denticulated, deeply incised in front. (Ad.) 



Habitat unknown. 



E. concinna AD., P. Z. S. 1851, p. 55, no. 25. SOWB. Thes. p. 

 212, f. 34, 39, 60 ; Conch. Icon. f. 13. 



This may be a synonym of E. decussata Phil, or E. elongata Costa. 



E. BELLULA A. Adams. PI. 28, fig. 37. 



Elongate-elliptical subdepressed, whitish, vertex subposterior, 

 declining ; closely sculptured with distant, prominent ribs and trans- 

 verse lines ; carina punctured above the slit ; margin of aperture 

 denticulate, sulcate within, deeply incised in front. The sculpture 

 is sharp, almost aculeated, and the cicatrix above the notch is 

 elevated into a prominent keel, pitted between two ridges. (Ad.) 

 Catanuan, Province oj Toyabos, Luzon, Philippines, 10 fms. 



